1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad245139713ab3393c2a975d476992c66c03a29b6b547bacc5d1e737591595a3. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8b3a0d00-de5e-401f-a567-dad692570de3.json and https://artists.proofprofile.net/proofs/artist/8b3a0d00-de5e-401f-a567-dad692570de3.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Brico Studio Cypher (feat. Sadajyo, doc flawless, i from tk, Task & QN)
NIGHT VISION (feat. Sadajyo, i from tk, Task & doc flawless)
What you want (feat. Sadajyo, i from tk & doc flawless)
Wizard (feat. AYUMI, i from tk & Kenzo Martini)
Ground Work (feat. Sadajyo & doc flawless)